The cuckolded husband's worst nightmare unfolds as his 50-year-old wife, driven by primal desires, engages in a torrid affair with a younger man, 30, in the confines of their hotel room at a thermal spa. The illicit lovers' bodies meld together, their cries of ecstasy filling the room as they lose themselves in a whirlwind of taboo passion, the husband's obliviousness only fueling their insatiable hunger for each other.